Locking mechanism for window latches



Oct. 14, 1952 N. o. HoLMs-rEN 2,613,525

LOCKING MECHANISM FOR WINDOW LATCHES 'Filed April 25, 1949 Patented Oct. 14, 1952 LOCKING MECHANISM FOR WINDOW LATCHES Neil 0. Holmsten, New Rochelle, N. Y.

Application April 23, 1949, Serial No. 89,186 l (c1. 'ro-89) 1 Claim.

This invention relates generally to latching means for windows or doors. More speccally, the invention relates to a locking means to be used in conjunction with a pivoted latch such as is used on French windows and the like.

The invention is especially designed for application to standard type pivoted latches which are already in use for holding windows or doors closed. Latches of this type are attached to the inside of a window, or door, and are quite effective for holding them closed, but it is a relatively simple matter for an unauthorized person to release, the latch and open the window, or door, to which it is applied, to gain entrance to a building. It is only necessary to break a window pane or remove a small section thereof, or cut a small hole through a door, and then reach in from the outside and release the latch after which the window or door may be opened.

This invention, as disclosed herein, is adapted to be applied to either single or double windows or doors and comprises a yoke, shackle or casing which is adapted to envelop the operating handle of a latching member secured to a window or door jamb. A-key-operated or combination locking means is provided to lock the yoke, shackle or casing in engagement with the operating handle when the latching member is in latching position and thus prevent releasing of the latching member by unauthorized persons.

The principal object of the invention is to provide an improved locking mechanism for application to windows or doors to be used in conjunction with standard type latching means thereon.

Another object of the invention is to provide a locking mechanism of the type which is of simple construction, encient in operation, and which is relatively inexpensive to manufacture.

-Other and more limited objects of the invention will be apparent from the following specication and the accompanying drawings forming a part thereof wherein:

Fig. l is a front elevation showing my invention as it is applied to a French window in locking position;

Fig. 2 is a vertical section taken on the line 2-2 of Fig. 1;

Fig. 3 is a sectional rear elevation taken on the line 3--3 of Fig. 2;

Fig. 4 is ay horizontal section taken on the line 4-4 of Fig. 1; and

Fig. 5 is a horizontal section taken on the line 5-5 of Fig. 1.

The invention as illustrated herein is shown as applied to swinging windows or doors which are 2 i adapted to be held in closed position by a standard latching mechanism which includes an operating handle, by which the latching mechanism is moved between latching and unlatching positions. The locking mechanism includes means which are adapted to envelop the operating handle and a lock by which the handle enveloping means is retained in position.

Referring now to the drawings by reference characters, the numeral I indicates a section of a stationary jamb against which a swinging window 2 is adapted to abut when closed. The. window 2 comprises a frame 3 and a glass pane 3 which is suitably secured in the frame 3. A latch, generally indicated by the numeral 5, which is provided for holding the window 2 closed against the jamb I, is swingingly mounted in a plane perpendicular to the jamb I upon a shaft 5 which extends between ears 'I oi a bracket 3 which is secured to the inner face of the jamb I by screws 9. The latch 5 consists of an operating handle IEI and a latching finger I I integral therewith. In locking position the latching 1inger II is projected out through aligned openings I2 and I3 in the jamb I and frame 3 and thence upwardly into engagement with the outer surface of the frame 3, as indicated at I4. In order to withdraw the latching finger II from the frame i 3 to unlatch the window 2, the operating handle III is swung inwardly about the pivot shaft 6, which moves the linger II downwardly and inwardly through the aligned slots I2 and I3, unlatching the window. To latch the window, the handle I0 is swung outwardly, which projects the latching iinger II outwardly through the aligned slots I2 and I3 and upwardly into engagement with the outer surface of the frame 3.

In order to lock the latch 5 in latching position, I provide a locking mechanism, which is generally indicated by the numeral I5. The locking mechanism I5 comprises a case I5 which consists of a base plate I'I, a cover plate I8 and an annular frame I9, which are shown as held together by screws 20. The case I 6 is secured to the jamb I by non-removable screws or rivets I'Ea. A boss 2l is secured by welding or other suitable means to the inner face of the cover I8 Within the casing I 6. The screws 2U are threaded into apertures 22 in the boss 2 I, as shown in Fig. 2. A locking plunger 23 is slidably mounted within the casing I6 against the inner face of the boss 2| and is held in position by a screw-stud 24 which extends through an elongated slot 25 in the locking plunger 23. The cover I8 has a pair of spaced rectangular apertures therethrough adjacent the upper end thereof through which the legs 21 of a bail or shackle 28 are adapted to be inserted into the casing I6. The lug 2| is cut away behind the apertures 2B, as indicated at 29, to permit the insertion of the legs 21. The locking plunger 23 is adapted to engage in notches 30 in the legs 21 of the shackle to retain the shackle in the casing. The shackle 28 is adapted to envelop or straddle the operating handle l0 so that when the shackle 28 is locked in position the operating handle I0 cannot be moved to release the latching ringer l I from engagement with the window frame 3. The locking plunger 23 is normally urged upwardly into locking position by spring member 3| which is secured to the frame I9 within the casing I6 and engages a stud 32 carried by the locking member 23. The locking plunger 23 is moved to unlocking position by an arm 33 which engages a stud 34 carried by a reduced downward extension 35 of the plunger 23, The lever 33 is secured by a nut 39 to a rotary plug 36, shown as keyoperated, Within a cylinder` lock 31 which extends into the casing I6 and is held in position therein by a nut 38. A spring member 40, secured to the base plate I1 within the casing i8, is provided to force the shackle 28 outwardly after the locking plunger 23 has been withdrawn from the notches 30 in the legs 21 of the shackle or bail 28.

From the foregoing it will be apparent to, those skilled in this art that I have provided a Very simple and eicient mechanism for accomplishing the objects of my invention.

It is to be understood that I am not restricted to the specific construction shown and described herein, as varidus modifications may be made thereto within the spirit of the invention.

What is claimed is:

A locking mechanism for securing a window latch adapted to hold a swinging window closed against a jamb and having a latching nger pivoted to said jamb to engage and hold the window closed and having an operating handle 5 mounted to swing outwardly in a plane normal to said jamb to move said nger into and out of engagement with the window, said handle when in latching position extending along said jamb and having a top surface a portion of which at least is parallel to said jamb, said locking mechanism comprising a casing secured td said jamb, a U-shaped shackle adapted to be disposed about said operating handle and having parallel legs extending to said casing, a plunger slidably mounted in said casing and spring-pressed into latching engagement with said legs, a cylinder lock extending into said casing and having a rotary plug incorporated therein, a stud secured to said plunger, and a lever secured to said rotary plug adapted to engage said stud to Withdraw said plunger from engagement with said legs when said plug is rotated.

NEIL O'. HOT MSTEN.

25213 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 305 'Number Name Date 1,542,442 Fraim June 16, 1925 1,707,266 Hillborn Apr. 2, 1929 2,100,616 Talbot et al Nov. 30, 1931 A A 2,333,584 Rosberg Nov. 2, 1943 u FOREIGN PATENTS Number Country Date 11,361 Denmark Oct. 5, 1908 23,727 Australia Nov. 1'0, 1930 

